Sen. Ricardo Monreal, a Morena party ally of President Andrés Manuel López Obrador, said in the evening via Twitter that the president had accepted the resignation and it would now go to the Senate, as spelled out by the constitution.

Supreme Court President Arturo Zaldívar announced online that he would be attentive to determinations by the president and Senate regarding the resignation.

A statement from the court said it was awaiting confirmation. Multiple Mexican media outlets also reported the resignation.

Broadcaster Televisa said it was the first time the high tribunal has seen a resignation since a 1994 constitutional reform that created the court in its current form.

Among other high-level posts, in the three previous governments, Medina Mora served as secretary of the Public Security Department under President Vicente Fox, attorney general under President Felipe Calderón and ambassador to the United States under President Enrique Peña Nieto.

Medina Mora became a Supreme Court justice in 2015.

Media reports this summer raised questions about bank transfers to accounts in the United States and the United Kingdom _ allegedly well above Medina Mora’s declared income in Mexico between 2013 and 2017, according to El Universal _ though it was not clear if there was any relation to the resignation.

López Obrador acknowledged in June that Mexico’s Financial Intelligence Unit had received information from the United States about the deposits, but said there was no proof of wrongdoing.